JPH11166719A - Dust trap device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the pressure loss of an air flow to surely trap and remove dust contained in the air flow. SOLUTION: The assembly comprises a tubular member 40 having a hole defining an air flow trap passage 31, trap pieces 41 inside protruding from the inner wall of the passage 31 with obstacles 42a, 42b, 42c for disturbing the air flow in the passage 31 so as to divide the air flow entering from an inlet 36 into right and left branches, thereby deflecting the dust contained in the air flow from the air flow path, utilizing its gravitational force and colliding and removing it against the trap pieces, and filters 45a, 45b, 45c for trapping and removing the dust, thereby blowing a clean air without dust out of an outlet 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention captures and removes dust (dust) in the air which is provided to a combustion device such as a water heater or a bath kettle and is guided to a flow rate detection sensor for detecting a flow rate of combustion air. The present invention relates to a dust trap device.

[0002]

2. Description of the Related Art FIG. 4 shows a system configuration of a water heater under development by the applicant. In FIG.
The apparatus main body 2 is accommodated therein, and a combustion chamber 3 is provided inside the apparatus main body 2, and a burner 4 is installed below the combustion chamber 3. A gas nozzle 7 attached to a nozzle header 6 is opposed to the gas introduction section 5 of the burner 4, and a gas supply passage 8 is connected to the nozzle header 6. The gas supply passage 8 has a nozzle header 6
Valve 10 for supplying and shutting off gas to the burner 4 and proportional valve 11 for controlling the supply amount of gas to the burner 4 by the opening amount
And an original solenoid valve 12 for opening and closing the gas supply passage 8. A combustion fan 13 for supplying and discharging burner combustion is provided below the burner 4, and an air chamber 14 is formed between the combustion fan 13 and the burner 4.

[0003] Between the air chamber 14 and the combustion chamber 3, there is provided an air distribution passage 15 for taking in and flowing a part of the combustion air supplied from the combustion fan 13 to the burner 4. An airflow detection sensor 16 that detects the airflow of the combustion air supplied from the combustion fan 13 to the burner 4 is provided in the branch passage 15. The air volume detection sensor 16 is constituted by an appropriate sensor having a function of directly or indirectly detecting the air volume, such as a hot-wire heater type wind speed sensor or a differential pressure sensor.

[0004] Above the combustion chamber 3 is a hot water supply heat exchanger 1
A water supply passage 18 is connected to the inlet side of the hot water supply heat exchanger 17. The water supply passage 18 has a water amount sensor 20 for detecting a water supply flow rate and a water supply temperature sensor 21 for detecting a water supply temperature. Is provided. A hot water supply passage 22 is connected to the outlet side of the hot water supply heat exchanger 17, and the hot water supply passage 22 is provided with a hot water supply temperature sensor 23 for detecting a hot water supply temperature and a water amount control valve 24 for controlling a hot water supply flow rate.

The operation of the water heater is controlled by a controller 25, to which a remote controller 26 for setting operating conditions such as hot water temperature is connected by signal.

[0006] The control device 25 controls the gas supply amount by the opening amount of the proportional valve 11 so that the hot water supply temperature becomes the hot water supply set temperature set by the remote controller 26, and also controls a predetermined appropriate air-fuel ratio. The rotation of the combustion fan 13 is controlled so as to be as follows. The control of the air volume of the combustion air will be described in more detail. The control device 25 is provided with data on the relationship between the amount of combustion heat and the amount of air supplied (air volume), and the target air volume corresponding to the required combustion heat amount obtained by calculation. And controls the rotation of the combustion fan 13 so that the air volume detected by the air volume detection sensor 16 becomes the target air volume. In FIG. 4, reference numeral 27 denotes a fan rotation detection sensor that detects the rotation of the combustion fan 13 per unit time.

[0007]

As described above, a part of the combustion air supplied from the combustion fan 13 to the burner 4 is diverted through the air distribution passage 15 to detect the fan airflow.
By performing the rotation control of the combustion fan 13 based on the air volume detection information, a suitable air-fuel ratio control in which the amount of combustion heat and the air volume match can be performed. However, combustion fan 1
The air taken in from the outside by 3 contains dust such as dust and garbage, and the air volume detection sensor 16 directly contacts the air passing through the air branch passage 15 to detect the air volume. As the dust adheres to the air volume detecting unit and the amount of the dust attached increases, a problem that the air volume detection performance of the air volume detection sensor 16 deteriorates occurs, and the reliability of the air volume detection for a long time is impaired. There is a problem that the accuracy of the air-fuel ratio control is also reduced.

In order to solve such a problem, the applicant has been studying a dust trap device incorporating an air volume detection sensor 16 as shown in FIG.

In the dust trap device of this study, a trap passage 31 is formed on the front side of the body main body 28 via a partition 30 and a sensor installation space 32 is formed on the back side as shown in FIG. In the trap passage 31, trap walls 33 are formed so as to alternately overlap and protrude from both side walls of the passage at right angles. A partition wall 34 for partitioning the left and right trap passages 31 is provided at the center, and the left and right trap passages 31 communicate with each other via the sensor installation space 32.

That is, a communication hole 35a communicating with one end of the sensor installation space 32 is formed in the left trap passage connected to the partition wall 34, and a communication hole 35a is formed in the right trap passage 31 at the other end of the sensor installation space 32. A communication hole 35b for communication is provided, and the flow of the wind introduced from the inlet 36 of the trap passage 31 on the left side is guided to the sensor installation space 32 on the back side through the communication hole 35a through the trap passage 31 on the left side. The wind passing through the space 32 is guided from the communication hole 35b to the right trap passage 31 formed on the surface side, and is sent out from the outlet 37 of the trap passage 31 through the right trap passage 31. I have.

The sensor installation space 32 is a space of a straight path connecting the communication holes 35a, 35b arranged side by side via the partition wall 34 at the shortest distance. A detection sensor 16 is provided. In this dust trap device, the inlet side 36 is set to the air chamber 14 side, and the outlet side 37 is set to the combustion chamber 3 side, and is provided in the air distribution passage 15.

In this dust trap device, a plurality of trap walls 33 are formed alternately in the trap passage 31 so as to protrude with their tip sides overlapping, so that the flow of combustion air flowing therethrough is as shown by the arrow in FIG. When the wind is bent by the trap wall 33 in a zigzag direction substantially in the direction of 90 ° and meanders, the dust contained in the air receives the inertia force in the straight direction when the wind is bent by the trap wall 33. Because of this, they could not turn sharply, hit the trap wall 33 and were prevented from entering,
The dust is captured and removed, and the wind from which the dust has been removed enters the sensor installation space 32, thereby preventing dust from adhering to the air volume detection unit of the air volume detection sensor 16 and improving the air volume detection accuracy of the air volume detection sensor 16 for a long time. And to improve the accuracy and reliability of airflow detection.

However, the dust trap device of the study shown in FIG. 5 has a configuration in which the tip side of the trap wall 33 is overlapped from the trap passage 31 and the trap wall 33 projects in a substantially perpendicular direction in a zigzag manner. Since the flow of the wind passing through the zigzag 31 changes zigzag by changing the direction of the flow alternately by approximately 90 °, a problem occurs that the pressure loss becomes extremely large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to minimize the pressure loss of the air flow, to reliably capture and remove dust in the air, and to remove clean air. An object of the present invention is to provide a dust trap device that can send the dust trap device.

[0015]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has the following structure to solve the problems. That is, the first invention forms a trap passage for air flowing through the cylindrical hole of the cylindrical member, the trap passage having a trap protruding portion projecting inward from the inner wall of the trap passage, and a trap air passage. This is a means for solving the problem by having a configuration in which one or more obstacles disturbing the flow are provided.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, at least one of a trap projection and an obstacle is provided.
One is a means for solving the problem with a configuration having a filter member made of a filter material having a plurality of ventilation holes.

Further, according to the third invention, in addition to the configuration of the second invention, a plurality of trap projections or obstacles having a filter member are provided along the flow direction of the trap passage. The problem is solved by having a configuration in which a filter member provided in a part or an obstacle has a filter material provided with fine ventilation holes as the installation position goes from the entrance side to the exit side of the trap passage. And means for doing so.

Further, in the fourth invention, in addition to the structure of the first, second or third invention, at least one obstacle is a spiral member having a spiral groove or blade formed on the outer peripheral side. To solve the problem.

According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, a filter member having a filter material is provided on a trap passage wall where air diffused by an obstacle of the spiral member hits. It has a configuration to solve the problem.

Further, according to a sixth aspect of the present invention, in addition to the structure of any one of the first to fifth aspects, at least one obstacle is formed in a conical shape having a pointed lower portion. The means for solving the problem has a configuration in which a concave portion for collecting dust in flowing air is formed on the upper surface.

Further, in the seventh invention, in addition to the structure of any one of the first to sixth inventions, a dust box for storing dust is provided below the entrance of the trap passage. It is a means to solve problems.

In the present invention having the above-described structure, the trapping passage for the flowing air is provided with at least one trap protrusion protruding inward from the inner wall of the trap passage and at least one obstacle that disturbs the flow of the flowing air. As a result, the flowing air collides with the trap protrusions and disturbs the flow, and also impinges on the obstacle or disturbs the flow due to obstruction of the flow. A change occurs, and the dust contained in the flow, due to the action of the inertial force, cannot follow the complicated flow change and deviates from the complicated path change of the air flow and collides with the trap protrusion. The captured small dust particles as well as the large dust particles are effectively captured and removed.

As described above, in the present invention,
Since the flowing air collides with the trap protrusion and the obstacle, the flow of the air proceeds in a disturbed direction, so that the air flow does not change its direction in a 90 ° zigzag direction and the pressure loss of the air flow is reduced. Therefore, the above problem can be solved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The dust trap device of the present embodiment is provided in the air distribution passage 15 of the water heater shown in FIG. 4, and the system configuration of the water heater is the same as that described in FIG. Are denoted by the same reference numerals, and the description thereof will not be repeated.

FIG. 1 shows an embodiment of a dust trap device according to the present invention. As shown in FIG.
The dust trap device of the present embodiment has a cylindrical member 40 and forms a trap passage 31 for air flowing through a cylindrical hole of the cylindrical member 40. The cylindrical member 40 is provided at its lower side with an inlet 36 for introducing the flow of air flow into the cylindrical member 40, and an outlet 37 at the upper side of the cylindrical member 40.

The trap passage 31 has a trap protrusion 4 projecting inward from an inner wall 47 of the trap passage 31.
In the trap passage 31, a plurality of obstacles 42a, 42b, 42c disturbing the flow of flowing air are displaced from the trap projection 41 in the longitudinal direction of the trap passage 31. Is provided. In addition,
The obstacle 42a is provided on the upstream side of the trap protrusion 41a, the obstacle 42b is provided on the upstream of the trap protrusion 41b, and the obstacle 42c is provided on the trap protrusion 41.
b is provided on the downstream side. The trap protrusion 41b is formed by the filter member 45b.

The obstacle 42a is, for example, a spherical obstacle, and the obstacle 42b is, for example, a cylindrical obstacle formed with a filter member 45a made of a filter material having a plurality of ventilation holes. The obstacle 42c is a spiral member having a spiral groove 46 formed on the outer peripheral side, and the trap passage wall portion (trap passage 31) on which air diffused by the obstacle 42c of the spiral member hits.
Of the filter member 4 provided with the filter material
c is provided.

Obstacle 42b having filter member 45a
The trap projection 41b having the filter member 45b and the filter member 45c are provided in the direction of the flow path of the trap passage 31, and the filter members 45a, 45b,
Reference numeral 45c denotes an installation position of the entrance 36 of the trap passage 31.
It is formed to have a filter material provided with fine ventilation holes from the side toward the outlet 37 side. That is, in the present embodiment, the ventilation hole of the filter member 45b is formed finer than the ventilation hole of the filter member 45a, and the ventilation hole of the filter member 45c is
It is formed finer than the vent hole 5b.

An air flow detection sensor 16 is provided on the outlet 37 side of the trap passage 31, and the dust box 4 for storing dust is provided below the inlet 36 of the trap passage 31.
4 are provided.

This embodiment is formed as described above. As shown in FIG. 2, the flow of air entering from the inlet 36 collides with the trap projection 41 to disturb the flow. 42a, 42b, and 42c, and the obstacles 42a, 42b, and 42c disturb the flow and disturb the flow. For example, as shown by arrows in FIG.
The direction of the air flow is divided into the left and right sides of the trap passage 31 and the dust 39 contained in the flow is caused by the inertial force of the trap 39 to protrude from the trap passages provided downstream of the obstacles 42a and 42b. The small projections 41 reliably collide with the portions 41 a and 41 b and the small projections 39 as well as the large dusts 39 are reliably captured.

Further, the air that has proceeded upstream from the trap projection 41b is efficiently diffused by the spiral groove 46 formed in the obstacle 42c, and the diffused air collides with the filter member 45c. , Filter member 4
5c ensures capture.

In this embodiment, the filter member 4
Since the air holes of the filter materials 5a, 45b, and 45c are formed finer from the inlet 36 side of the trap passage 31 toward the outlet 37 side, that is, from the upstream side to the downstream side of the trap passage 31, The large dust 39 is captured by the filter member 45a, and then the dust 39 passing through the ventilation hole of the filter member 45a is captured by the filter member 45b, and further, the dust 39 passing through the ventilation hole of the filter member 45b.
Is captured by the filter member 45c, so that dust 3 is formed in each of the ventilation holes of each of the filter members 45a, 45b, and 45c.
9 is not clogged and the dust 39 is
a, 45b, and 45c. The dust 39 is captured and removed by the filter members 45a, 45b, 45c and the trap projection 41, and clean air is guided to the outlet 37 side of the trap passage 31, and comes into contact with the air volume detection sensor 16. .

When the combustion fan 13 stops and the combustion air supplied from the combustion fan 13 to the burner 4 stops flowing from the inlet 36 to the outlet 37 of the trap passage 31,
Each of the trap projections 41 and each of the filter members 45a, 4
Dust 39 trapped in 5b and 45c is trap passage 3
The dust 39 falls below the first container 1 and is stored in a dust box 44 provided below the entrance 36 of the trap passage 31.

According to this embodiment, as described above, a plurality of trap projections 41 and obstacles 4
2a, 42b, and 42c are provided, and the obstacles 42a, 4
By trapping the dust 39 contained in the flow by the trap projection 41 very efficiently by disturbing the flow of the air by the 2b and 42c and dividing the air into the left and right sides of the trap passage 31. Can be.

In this embodiment, the obstacle 42b
Has a filter member 45a made of a filter material. In addition, since the trap projection 41b is formed with the filter member 45b, the filter member 45a of the obstacle 42b and the filter member 4a of the trap projection 41b are formed.
Since the dust 39 can also be trapped and removed by 5b, the dust 39 can be trapped and removed more efficiently.

Further, according to the present embodiment, the obstacle 4
The dust 39 can be captured and removed even more reliably by forming the spiral member 2c and providing the filter member 45c on the inner wall 47 of the trap passage 31 to which the air diffused by the spiral member hits.

From the above, according to this embodiment,
The dust 39 contained in the air flowing through the trap passage 31 is
It is possible to reliably capture and remove not only large dust but also small minute dust, so that very clean air can be sent to the outlet 37 side of the trap passage 31 and brought into contact with the air volume detection sensor 16.

According to the present embodiment, the obstacle 42
b, and the filter member 45b and the filter member 45c of the trap projection 41b are provided in the flow direction of the trap passage 31, and the filter members 45a,
45b and 45c have a configuration in which a filter material having fine ventilation holes is provided from the inlet 36 side to the outlet 37 side of the trap passage 31 from the inlet 36 side to the outlet 37 side. When the flowing air flows, the dust can be trapped and removed in order from the large dust 39, so that the filter members 45a, 45b,
It is possible to suppress the clogging of the dust 45c and the like, and it is possible to capture and remove the dust 39 very reliably, and to reliably capture and remove the dust 39 by the filter members 45a, 45b, and 45c for a long period of time. be able to.

Further, according to this embodiment, as described above, the air flow is disturbed by the obstacles 42a, 42b, 42c, and the flow direction is changed by the obstacles 42a, 42b, 42c and the trap projection 41. Since the flowing air travels through the space between the inner wall 47 of the tubular member 40 and the air passage, unlike the dust trap device shown in FIG. 5, the air flow does not proceed in a 90 ° zigzag direction, and The pressure loss of the flow can be reduced.

Further, in this embodiment, since the dust box 44 is provided below the entrance 36 of the trap passage 31, the dust 39 that has fallen while the combustion fan 13 is stopped is stored in the dust box 44, When air is re-introduced into the trap passage 31 due to re-driving of the combustion fan 13, it is possible to reliably suppress the dust 39 captured previously from flying up.

It should be noted that the present invention is not limited to the above-described embodiment, but can adopt various embodiments. For example,
In the above embodiment, the obstacle 42 is
Although a, 42b, and 42c are provided, the number of obstacles provided in the trap passage 31 is not particularly limited and may be appropriately set, and may be one or more. In the above embodiment, the trap passage 31
Although three sets of trap projections 41 are provided, the number of trap projections 41 to be installed is not particularly limited, and one or more appropriate number of trap projections 41 may be provided.

Further, the shape, size, installation position, and the like of the trap projection 41 and the obstacle provided in the trap passage 31 are not particularly limited, and may be set as appropriate. For example, the dust trap device may be configured by providing an obstacle 42d having a shape as shown in FIG. 3 as the obstacle. The obstacle 42d shown in the drawing is formed in a conical shape with the lower side being a pointed head, and a concave portion 43 for collecting dust in flowing air is formed on the upper surface thereof. Is formed in such a shape, as shown by the arrow in the figure, the flowing air swirls on the upper side of the obstacle 42d, and the dust 39 that cannot follow this flow is captured and collected in the concave portion 43. Very efficiently dust 3
9 can be captured and removed.

The at least one obstacle may be a spiral member having spiral blades formed on the outer peripheral side instead of the spiral groove 46 of the obstacle 42c.

Further, in the above embodiment, the dust box 44 is provided below the entrance 36 of the trap passage 31, but the dust box 44 may be omitted. However, by providing the dust box 44,
It is preferable to provide the dust box 44 so that the dust 39 is stored in the dust box 44 when the combustion fan 13 is stopped and the dust 39 can be prevented from flying up when the air flows into the trap passage 31 again.

Further, in the above-described embodiment, an example in which the dust trap device is provided in the water heater is shown. However, the present invention can be applied to various combustion equipment other than the water heater, for example, a bath pot, a combined bath / hot water supply machine, and the like. It is also possible to apply the present invention to a device for removing dust components in an air flow other than the combustion equipment.

[0046]

According to the present invention, one or more trap projections and obstacles are provided in the trap passage, and the flow of the flowing air is disturbed by the obstacles and is complicatedly changed to be included in the flowing air. Since the dust collides with the trap projection and is trapped, the dust component contained in the flowing air can be trapped and removed irrespective of the size of the dust.

Further, according to the present invention, as described above, the flow of the flowing air is disturbed by the obstacles to advance the trap passage, so that, for example, the flowing air is changed in a 90 ° zigzag direction. Unlike the case of moving forward, the pressure loss of the air flow can be reduced.

Furthermore, according to the present invention, at least one of the trap projection and the obstacle is formed with a filter member made of a filter material having a plurality of ventilation holes, dust is efficiently removed by the filter member. The dust component contained in the flowing air can be captured and removed more clearly.

Further, a plurality of trap protrusions or obstacles having a filter member are provided along the flow direction of the trap passage, and the filter member provided on the trap protrusion or the obstacle is provided at the trap passage. According to the present invention, which has a filter material provided with fine vent holes from the inlet side to the outlet side of the trap passage, the size increases from the inlet side to the outlet side of the trap passage by the filter member. Since the dust can be captured and removed in order from the dust, the dust component of the flowing air can be captured and removed even more efficiently, and clogging of the filter member can be reliably prevented.

Further, according to the present invention, the at least one obstacle is a spiral member having a spiral groove or a blade formed on the outer peripheral side. In this way, the air flow is disturbed, and the dust component can be captured and removed.

Further, according to the present invention, in which the filter member provided with the filter material is provided on the trap passage wall where the air diffused by the obstacle of the spiral member hits, the obstacle is prevented by the obstacle of the spiral member as described above. Since the air flow is disturbed very efficiently, and the dust contained in the diffused air can be captured and removed very efficiently by the filter member, the flow of air is even more efficiently performed. It is possible to remove dust components therein.

Further, according to the present invention, at least one obstacle is formed in a conical shape having a pointed top on the lower side, and a concave portion for collecting dust in flowing air is formed on the upper surface thereof. With the object, dust in the flowing air can be collected in the concave portion of the obstacle, and the dust component in the flowing air can be captured and removed very efficiently.

Furthermore, according to the present invention, in which the dust box for storing dust is provided below the entrance of the trap passage, the dust dropped when no air is flowing into the trap passage can be stored in the dust box. In addition, it is possible to reliably prevent the dust trapped last time from soaring when the air re-enters the trap passage, so that the dust in the flowing air can be trapped and removed very efficiently.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a dust trap device according to the present invention.

FIG. 2 is an explanatory diagram showing a flow of air flowing into a dust trap device of the embodiment and a dust removing operation.

FIG. 3 is an explanatory view of an obstacle provided in another embodiment of the dust trap device according to the present invention.

FIG. 4 is an explanatory diagram showing a system configuration of a water heater in which the dust trap device of the embodiment is used.

FIG. 5 is a diagram illustrating the configuration of a dust trap device studied by the present applicant.

FIG. 6 is a sectional view of the communication holes 35a and 35b in FIG.

[Explanation of symbols]

 31 trap passage 40 cylindrical member 41 trap protrusion 42a, 42b, 42c obstacle 43 recess 44 dust box 45a, 45b, 45c filter member 46 spiral groove

Claims (7)

[Claims] 1. A trap hole for flowing air through a cylindrical hole of a cylindrical member, wherein the trap passage has a trap protruding portion projecting inward from an inner wall of the trap passage, and an obstruction disturbing the flow of the flowing air. A dust trap device provided with at least one object. 2. A trap projection and at least one of obstacles.
2. The filter according to claim 1, wherein the filter member has a filter member made of a filter material having a plurality of ventilation holes.
The dust trap device as described. 3. A plurality of trap protrusions or obstacles having a filter member are provided along the flow direction of the trap passage, and the filter member provided on the trap protrusion or the obstacle is provided at a position where the filter member is installed in the trap passage. 3. The dust trap device according to claim 2, wherein the dust trap device is formed with a filter material provided with finer ventilation holes from the inlet side to the outlet side. 4. The dust trap device according to claim 1, wherein the at least one obstacle is a spiral member having a spiral groove or blade formed on an outer peripheral side. 5. The dust trap device according to claim 4, wherein a filter member provided with a filter material is provided on a trap passage wall portion where air diffused by an obstacle of the spiral member hits. 6. The at least one obstacle is formed in a conical shape having a pointed top on a lower side, and a concave portion for collecting dust in flowing air is formed on an upper surface thereof. The dust trap device according to claim 1. 7. The dust trap device according to claim 1, wherein a dust box for storing dust is provided below the entrance of the trap passage.